On 03/23/2012 02:56 PM, Abdelrahman Ahmed wrote:
2012/3/23 George Nychis <gnyc...@gmail.com <mailto:gnyc...@gmail.com>>
Finding white space in the spectrum can be done by looking at
power across the bins you are monitoring. I have done White space
research with the USRP2 and the WBX, and they worked out great for
me. So you're on the right track!
Take a look at this work, Section 3.1:
http://static.usenix.org/event/nsdi10/tech/full_papers/yang.pdf
They have a basic technique for detecting white space. Their
paper was not about the TV bands, but the technique should work
elsewhere.
Best of luck, and welcome!
- George
ok, now i installed ubuntu from scratch on the two laptops not with
windows.
so is there something missing in this installation :
i used this link in synaptic to install gnuradio packages:
11.10 contains 3.2.2.dfsg-1ubuntu7
(http://packages.ubuntu.com/oneiric/gnuradio)
and this guide to install the other packages :
http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall#Install-Dependencies
After successful installation still there is UHD, i installed it
through this:
git clone git://code.ettus.com/ettus/uhd.git
<http://code.ettus.com/ettus/uhd.git>
cd uhd/host
mkdir build
cd build
cmake ../
make
make test
sudo make install
#Check where your path is with "find |grep libuhd"
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
i did not do anything else ??
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Ok, someone else has already suggested this, and now I'm going to
suggest it more assertively.
http://www.sbrac.org/files/build-gnuradio
If you fetch a packaged-by-the-distrib Gnu Radio, and a UHD from source,
you're *guaranteed* to have compatibility/ABI problems.
So, again:
http://www.sbrac.org/files/build-gnuradio
It works, so you don't have to. It does require that you have SUDO
access, but you should have that anyway.
Download it, chmod it 755 and simply run it. It will acquire SUDO as it
needs to and prompt you.
Takes under an hour even on fairly wimpy machines.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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